This plugin adds extra validations to a host.

Rails Devs For Data Integrity catches unique key and foreign key violations coming from the MySQLdatabase and converts them into an error on the ActiveRecord object similar to validation errors

Data structures, validation, coercion and processing toolkit for Ruby

FlowChat is a Rails framework for building sophisticated conversational interfaces across USSD and WhatsApp platforms. Create interactive flows with menus, prompts, validation, media support, and session management. Features include multi-tenancy, background job processing, built-in simulator f...

DataMapper plugin providing better error messages handling.

Validate your ActiveRecord models on the client, showing their error and success messages by providing a validation controller.

Allows testing vor valid html (including html5) and css. In addition you can configure the gem to use a locally installed validation service instead of the online w3c servers

CouchRest::ExtendedDocument provides aditional features to the standard CouchRest::Document class such as properties, view designs, callbacks, typecasting and validations.

It provides validation of URIs (URLs) to ActiveModel records and ActionControllers in Rails 3.

Validation and helper methods for string based enums in rails

AddressValidate is a ruby wrapper for integrating with the USPS address validation api.

Combine email validation and transformations to produce canonical email addresses.

GTIN provides basic validation, checksum and conversion functionality for UPC, EAN and GTIN barcode values.

A managing interface layer for handling the creation and validation of JWTs

Simple and composable validation and coercion of data structures inspired by clojure specs

RFC822 compatible email validation and MX record check

Postgresql constraints in migrations similiar to ActiveRecord validations

DB constraints in migrations similiar to ActiveRecord validations. Core classes

Optout helps you write code that will call exec() and system() like functions. It allows you to map hash keys to command line arguments and define validation rules that must be met before the command line options are created.

Gem includes validations, card brand detection method, etc.